--- a/browser/config/mozconfigs/win32/nightly
+++ b/browser/config/mozconfigs/win32/nightly
@@ -1,7 +1,4 @@
 . "$topsrcdir/browser/config/mozconfigs/common"
-
-# for pgo
-mk_add_options PROFILE_GEN_SCRIPT='$(MAKE) -C $(MOZ_OBJDIR) pgo-profile-run'
 
 ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
 ac_add_options --enable-update-packaging